EP1121650B1 - Method and apparatus for constructing and maintaining a user knowledge profile - Google Patents
Method and apparatus for constructing and maintaining a user knowledge profile Download PDFInfo
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- EP1121650B1 EP1121650B1 EP99945206.3A EP99945206A EP1121650B1 EP 1121650 B1 EP1121650 B1 EP 1121650B1 EP 99945206 A EP99945206 A EP 99945206A EP 1121650 B1 EP1121650 B1 EP 1121650B1
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- user
- knowledge
- term
- profile
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
- G06F21/6218—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database
- G06F21/6245—Protecting personal data, e.g. for financial or medical purposes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/30—Authentication, i.e. establishing the identity or authorisation of security principals
- G06F21/31—User authentication
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/30—Information retrieval; Database structures therefor; File system structures therefor of unstructured textual data
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/953—Querying, e.g. by the use of web search engines
- G06F16/9535—Search customisation based on user profiles and personalisation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
- G06Q10/0639—Performance analysis of employees; Performance analysis of enterprise or organisation operations
- G06Q10/06393—Score-carding, benchmarking or key performance indicator [KPI] analysis
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/10—Office automation; Time management
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q30/00—Commerce
- G06Q30/02—Marketing; Price estimation or determination; Fundraising
- G06Q30/0201—Market modelling; Market analysis; Collecting market data
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q40/00—Finance; Insurance; Tax strategies; Processing of corporate or income taxes
- G06Q40/04—Trading; Exchange, e.g. stocks, commodities, derivatives or currency exchange
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
- H04L63/102—Entity profiles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/2866—Architectures; Arrangements
- H04L67/30—Profiles
- H04L67/306—User profiles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S707/00—Data processing: database and file management or data structures
- Y10S707/99931—Database or file accessing
- Y10S707/99933—Query processing, i.e. searching
- Y10S707/99935—Query augmenting and refining, e.g. inexact access
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S707/00—Data processing: database and file management or data structures
- Y10S707/99931—Database or file accessing
- Y10S707/99933—Query processing, i.e. searching
- Y10S707/99936—Pattern matching access
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S707/00—Data processing: database and file management or data structures
- Y10S707/99931—Database or file accessing
- Y10S707/99939—Privileged access
Description
- The present invention relates generally to the field of knowledge management and, more specifically, to a method and apparatus for automatically constructing a user knowledge profile and knowledge repository of electronic documents.
- The new field of "knowledge management" (KM) is receiving increasing recognition as the gains to be realized from the systematic effort to store and export vast knowledge resources held by employees of an organization are being recognized. The sharing of knowledge broadly within an organization offers numerous potential benefits to an organization through the awareness and reuse of existing knowledge, and the avoidance of duplicate efforts.
- In order to maximize the exploitation of knowledge resources within an organization, a knowledge management system may be presented with two primary challenges, namely (1) the identification of knowledge resources within the organization and (2) the distribution and accessing of information regarding such knowledge resources within the organization.
- The identification, capture, organization and storage of knowledge resources is a particularly taxing problem. Prior art knowledge management systems have typically implemented knowledge repositories that require users manually to input information frequently into pre-defined fields, and in this way manually and in a prompted manner to reveal their personal knowledge base. However, this approach suffers from a number of drawbacks in that the manual entering of such information is time consuming and often incomplete, and therefore places a burden on users who then experience the inconvenience and cost of a corporate knowledge management initiative long before any direct benefit is experienced. Furthermore, users may not be motivated to describe their own knowledge and to contribute documents on an ongoing basis that would subsequently be re-used by others without their awareness or consent. The manual input of such information places a burden on users who then experience the inconvenience and cost of a corporate knowledge management initiative long before any direct benefit is experienced.
- It has been the experience of many corporations that knowledge management systems, after some initial success, may fail because either compliance (i.e., the thoroughness and continuity with which each user contributes knowledge) or participation (i.e., the percentage of users actively contributing to the knowledge management system) falls to inadequate levels. Without high compliance and participation, it becomes a practical impossibility to maintain a sufficiently current and complete inventory of the knowledge of all users. Under these circumstances, the knowledge management effort may never offer an attractive relationship of benefits to costs for the organization as a whole, reach a critical mass, and the original benefit of knowledge management falls apart or is marginalized to a small group.
- In order to address the problems associated with the manual input of knowledge information, more sophisticated prior art knowledge management initiatives may presume the existence of a centralized staff to work with users to capture knowledge bases. This may however increase the ongoing cost of knowledge management and requires a larger up-front investment before any visible payoff, thus deterring the initial funding of many an otherwise promising knowledge management initiatives. Even if an initial decision is made to proceed with such a sophisticated knowledge management initiative, the cash expenses associated with a large centralized knowledge capture staff may be liable to come under attack, given the difficulty of quantifying knowledge management benefits in dollar terms.
- As alluded to above, even once a satisfactory knowledge management information base has been established, the practical utilization thereof to achieve maximum potential benefit may be challenging. Specifically, ensuring that the captured information is readily organized, available, and accessible as appropriate throughout the organization may be problematic.
- Further examples of prior art arrangements are described in
US-A-5,754,938 (Herz, Frederick S. M. et al ) and inUS-A-5,794,210 (Goldhaber, A. Nathaniel et al ).US 5,754,938 discloses customized electronic identification of desirable objects, such as news articles, in an electronic media environment, and in particular to a system that automatically, constructs both a "target profile" for each target object in the electronic media based, for example, on the frequency with which each word appears in an article relative to its overall frequency of use in all articles, as well as a "target profile interest summary" for each user, which target profile interest summary describes the user's interest level in various types of target objects.US 5,794,218 provides for the immediate payment to computer and other users for playing attention to an advertisement or other "negatively priced" information distributed over a computer network such as the Internet. Called Attention Brokerage this is the business of brokering the buying and selling of the "attention" of users. - According to a first aspect of the invention, there is provided a method of constructing a user knowledge profile including first/and second portions having different access restrictions. A confidence level is automatically assigned to content within an electronic document associated with a user, the content being potentially indicative of a user knowledge base. The content is then stored in either the first or the second portion of the user knowledge profile according to the assigned confidence level.
- According to a second aspect of the invention, there is provided apparatus for constructing a user knowledge profile including first and second portions having different access restrictions. The apparatus includes confidence logic to examine an electronic document, associated with a user, and to assign a confidence level to content within the electronic document, the content being potentially indicative of a user knowledge base. The apparatus further includes a profiler to store the content in either the first or second portion of the user knowledge profile according to the assigned confidence level.
- Other features of the present invention will be apparent from the accompanying drawings and from the detailed description that follows.
- The present invention is illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements and in which:
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Figure 1 is a block diagram illustrating a knowledge management system, according to an embodiment of the present invention. -
Figure 2 is a block diagram illustrating a knowledge site management server, according to an embodiment of the present invention. -
Figures 3 is a block diagram illustrating a knowledge access server, according to an embodiment of the present invention. -
Figure 4 is a block diagram illustrating a knowledge converter, according to an embodiment of the present invention. -
Figure 5 is a block diagram illustrating a client software program, add an e-mail message generated thereby, according to an embodiment of the present invention. -
Figure 6 is a block diagram illustrating the structure of a knowledge repository, according to an embodiment of the present invention, as constructed from the data contained in a repository database and a user database. -
Figure 7 is a flowchart illustrating a method, according to an embodiment of the present invention, of constructing a user knowledge profile. -
Figure 8 is a flowchart illustrating a high-level method, according to an embodiment of the present invention, by which terms may be extracted from an electronic document and by which confidence level values may be assigned to such terms. -
Figure 9A is a flowchart illustrating a method, according to embodiment of the present invention, of determining a confidence level for a term extracted from an electronic document. -
Figure 9B is a flowchart illustrating a method, according to embodiment of the present invention, by which a document weight value may be assigned to a document based on addressee information associated with the document. -
Figure 10 illustrates a term-document binding table, according to an embodiment of the present invention. -
Figure 11 illustrates a weight table, according to an embodiment of the present invention. -
Figure 12 illustrates an occurrence factor table, according to an embodiment of the present invention. -
Figure 13 illustrates a confidence level table, including initial confidence level values, according to an embodiment of the present invention. -
Figure 14 illustrates a modified confidence level table, including modified confidence level values, according to an embodiment of the present invention. -
Figure 15A is a flowchart illustrating a method, according to an embodiment of the present invention, of constructing a user knowledge profile that includes first and second portions. -
Figure 15B is a flowchart illustrating a method, according to an embodiment of the present invention, of storing a term in either a first or a second portion of a user knowledge profile. -
Figure 16A illustrates a user-term table, constructed according to the method illustrated inFigure 15A . -
Figure 16B illustrates a user-term table, constructed according to the method illustrated inFigure 15A . -
Figure 17A is a flowchart illustrating a method, according to an embodiment of the present invention, of facilitating access to a user knowledge profile. -
Figure 17B is a flowchart illustrating an alternative method, according to embodiment of the present invention, of facilitating access to a user knowledge profile. -
Figure 17C is a flowchart illustrating a method, according to embodiment of the present invention, of performing a public profile process. -
Figure 17D is a flowchart illustrating a method, according to an embodiment of the present invention, of performing a private profile process. -
Figure 17E is a flowchart illustrating a method, according to an embodiment of the present invention, of performing a profile modification process. -
Figure 18A is a flowchart illustrating a method, according to an embodiment of the present invention, of addressing an electronic document for transmission over a computer network. -
Figure 18B is a flowchart illustrating a method, according to an embodiment of the present invention, of executing an "'explain" function that provides the reasons for the proposal of an e-mail recipient. -
Figure 18C is a flowchart illustrating a method, according to an embodiment of the present invention, of executing a "more" function that proposes further potential recipients for an e-mail message. -
Figure 18D illustrates a user dialog, according to an embodiment of the present invention, through which a list of potential recipients is displayed to an addressor of an e-mail message. -
Figure 19 is a flowchart illustrating a method, according to an embodiment of the present invention, of managing user authorization to publish, or permit access to, a user knowledge profile. -
Figure 20 is a flowchart illustrating a method, according to an embodiment of the present invention, of assigning a confidence value, either in the form of a confidence level value or a confidence memory value, to a term. -
Figure 21 is a flowchart illustrating a method, according to an embodiment of the present invention, of determining or identifying a confidence value, either in the form of a confidence level value or a confidence memory value, for a term. -
Figure 22 illustrates a user-term table, according to an embodiment of the present invention, that is shown to include a confidence level value column, a confidence memory value column and a time stamp column. -
Figure 23 is a block diagram illustrating a machine, according to one embodiment, within which software in the form of a series of machine-readable instructions, for performing any one of the methods discussed above, may be executed. - A method and apparatus for constructing and maintaining a user knowledge profile are described. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be evident, however, to one skilled in the art that the present invention may be practiced without these specific details.
- With a view to addressing the above described difficulties associated with manual knowledge capture either by a profile owner or by a dedicated staff, there is provided a method and apparatus for capturing knowledge automatically, without excessive invasion or disruption of normal work patterns of participating users. Further, the present specification teaches a method and apparatus whereby a database of captured knowledge information is maintained continuously and automatically, without requiring that captured knowledge information necessarily be visible or accessible to others. The present specification also teaches facilitating the user input and modification of a knowledge profile associated with the user in a knowledge database at the user's discretion.
- The present specification teaches a method and apparatus for intercepting electronic documents, such as for example e-mail messages, originated by a user, and extracting terms therefrom that are potentially indicative of a knowledge base of the originating user. The extracted knowledge terms may then be utilized to construct a user knowledge profile. The grammatical structure, length, frequency and density with which the extracted knowledge terms occur within electronic documents originated by a user, and prior history of use of the extracted knowledge terms within an organization may furthermore be utilized to attach a metric, in the form of a confidence level value, to the relevant knowledge terms for the purpose of grouping, ranking, and prioritizing such knowledge terms. Knowledge terms may furthermore be stored in either a private or public portion of the user knowledge profile, depending upon the confidence level values thereof.
- It will be appreciated that the large volume of e-mail messages traversing an e-mail system over a period of time will contain a large number of terms that may be irrelevant to the identification of the knowledge base of a user. With a view to determining which terms are truly indicative of a knowledge base, a number of rules (or algorithms) may be exercised with respect to extracted terms to identify terms that are candidates for inclusion within a public portion of the user knowledge profile. Further rules (or algorithms) may be applied to an assembled knowledge profile for the purpose of continually organizing and refining the profile.
- Corporate e-mail systems have become increasingly pervasive, and have become an accepted medium for idea communication within corporations. Accordingly, the content of e-mail messages flowing within a large organization amounts to a vast information resources that, over the course of time, may directly or indirectly identify knowledge bases held by individuals within the organization.
- The present specification also teaches addressing privacy concerns associated with the examination of e-mail messages for the above purposes by providing users with the option selectively to submit originated e-mail messages for examination, or alternatively to bypass the examination and extraction system of the present invention.
- There is also taught a computer-implemented method and apparatus for addressing an electronic document, such as an e-mail message, for transmission over a computer network. The e-mail message may be examined to identify terms therein. The identified terms are then compared to a number of user knowledge profiles with a view to detecting a predetermined degree of correspondence between the identified terms and any one or more of the user knowledge profiles. In the event that a predetermined degree of correspondence is detected, the sender of the electronic document is prompted to either accept or decline the proposed recipient as an actual recipient of the electronic document, after first being offered an opportunity to inspect the specific basis of the correspondence between the identified terms and the proposed recipients. The e-mail message may also be parsed to extract recipients entered manually by the user. The degree of correspondence between the knowledge profiles of the manually entered recipients and the identified terms of the message is then optionally used as the basis of recommendations to the user that certain manually entered recipients be dropped from the ultimate list of recipients.
- This aspect of the present teachings is advantageous in that a sender of an e-mail message is presented with a list of proposed recipients, identified according to their knowledge profiles and the content of the e-mail message, who may be interested in receiving the e-mail message. Accordingly, the problems of over-distribution and under-distribution of e-mail messages that may be encountered within an organization may be reduced. Specifically, in the over-distribution situation, many users are frequently copied on e-mail messages, resulting in lost productivity as the users struggle to cope with increasing volumes of daily e-mail. Further, when the time available to read e-mail messages becomes restricted, users typically begin to defer reading of e-mail messages, and communication efficiency within the organization may be adversely affected. In the under-distribution situation, it may occur that the proper recipients of the message are not included in the distribution list, and accordingly fall "out of the loop".
- There is also taught a method of facilitating a user profile query or look-up wherein, in response to a match between a query and a user profile, the owner of the user profile may be prompted for authorization to publish all (or a portion) of the user profile to the originator of the query or to others generally. This is advantageous in that it addresses the above mentioned privacy concerns by treating the knowledge profile as a confidential resource under the control of the user. The user is thus also able to control the timing, circumstances and extent to which it is made accessible to others. A further advantage is that the user is prompted for input specifically to satisfy specific, pending requests of others. This relieves the user of the need to remember to modify his or her profile on a regular basis and the need to make decisions concerning the composition of the profile prospectively, prior to any actual use of the profile by others. In this manner the user saves time and effort, since the determination that manual interaction with the profile is necessary is a function of the present system, not a responsibility of the user.
- There is also taught a method of assigning a confidence level value to a term within an electronic document. This confidence level value is based on a first quantitative indicator, derived from the number of occurrences of the term within the electronic document, and a second characteristic indicator, derived utilizing the characteristic of the term.
- For the purposes of the present application, the word "term" shall be taken to include any acronym, word, collection of words, phrase, sentence, or paragraph. The term "confidence level" shall be taken to mean any indication, numeric or otherwise, of a level within a predetermined range.
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Figure 1 is a block diagram illustrating aknowledge management system 10, according to an embodiment of the present invention. Thesystem 10 may conveniently be viewed as comprising aclient system 12 and aserver system 14. Theclient system 12 may comprise one or more clients, such asbrowser clients 16 ande-mail clients 18, that are resident on terminals or computers coupled to a computer network. In one embodiment, each of thebrowser clients 16 may comprise the Internet Explorer client developed by Microsoft Corp. of Redmond, Washington, or the Netscape Navigator client developed by Netscape Communications of Menlo Park, California. Each of thee-mail clients 18 may further comprise the Outlook Express, Outlook 97,Outlook 98 or Netscape Communicator e-mail programs. As will be described in further detail below, the browser ande-mail clients 16 are complemented byextensions 19, that enable thee-mail clients 18 to send an electronic message (e.g., either an e-mail or HTML document) to aknowledge server 22 implemented on theserver side 14 of thesystem 10. As shown inFigure 1 , theextensions 19 may be integral with ane-mail client 18, or external to theclient 18 and in communication therewith. Theclients knowledge server 22, while allowing a user specifically to designate a communication not suitable for transmission to theknowledge server 22. The user designation may be facilitated through controls that are installed as software modules which interact with or modify ane-mail client 18, and which cause messages to be copied to a special e-mail address (e.g., a Knowledge Server (KS)mailbox 25 maintained by a e-mail server 23) associated with a knowledge server component. In the case where aclient extension 19 for performing this automatic transmission is not available, the user can manually add the e-mail address of theKS mailbox 25 to the list of recipients for the message. Further details in this regard are provided bellow. Files embedded within an e-mail message, such as attachments, may also be selectively included or excluded from the capture process and may also be selectively included or excluded from retention in a knowledge repository. - The
browser clients 16 are used as an additional means to submit documents to theknowledge server 22 at the discretion of a user. Thebrowser client 16 is used to access aninterface application 34, maintained on aweb server 20, which transmits documents to theknowledge server 22. A client may also propagate a list of bookmarks, folders or directories to theknowledge server 22 for the purpose of user knowledge profile construction. - The
server side 14 of thesystem 10 includes theweb server 20, thee-mail server 23 and theknowledge server 22. Theweb server 20 may be any commercially available web server program such as Internet Information Server (IIS) from Microsoft Corporation, the Netscape Enterprise Server, or the Apache Server for UNIX. Theweb server 20 includes theinterface application 34 for interfacing with theknowledge server 22. Theweb server 20 may run on a single machine that also hosts theknowledge server 22, or may alternatively run along with theinterface application 34 on a dedicated web server computer. Theweb server 20 may also be a group of web server programs running on a group of computers to thus enhance the scalability of thesystem 10. As theweb server 20 facilitates access to a local view of aknowledge repository 50, maintained by theknowledge access server 26, by thebrowser clients 16, the webserver interface application 34 implements knowledge application interfaces, knowledge management interfaces, user profile creation and maintenance interfaces, and a server management interface. Theweb server 20 also facilitates knowledge profile queries, e-mail addressing to ane-mail client 18, and any other access to theknowledge server 22 using the standard HTTP (web) protocol. - The
knowledge server 22 includes a knowledge site management server (KSMS) 27 and the knowledge access server (KAS) 26. Theknowledge server access 26 includes an interface that provides a local view of aknowledge repository 50, which is physically stored in theuser database 56A and arepository database 56B. The knowledgesite management server 27 is shown to have access to the local view of theknowledge repository 50 maintained by theknowledge access server 26. The illustrated components of theknowledge server 22 are collectively responsible for the capture (termed "knowledge discovery") of terms indicative of a user knowledge base and for the distribution of user knowledge profile information. Knowledge discovery may be done by the examination and processing of electronic documents, such as e-mail messages, which may be propagated to thee-mail server 23 from ane-mail client 18 via the Simple Mail Transfer Protocol (SMTP), as shown at 32. Alternatively, knowledge discovery may be implemented by the examination of submissions from abrowser client 16 via theweb server 20. - The
knowledge server 22 includes theknowledge access server 26 and the knowledgesite management server 27 as two separate and distinct server systems in view of the divergent functions provided by theservers site management server 27 functions primarily to manage non-interactive processing (e.g., the extraction of knowledge from inbound e-mail messages), to manage theuser information database 56A, and to implement various centralized system management processes. The knowledgesite management server 27 does not communicate interactively withclients 18, or withclients 16 except for administrative functions. Theknowledge access server 26, on the other hand, functions primarily to respond to queries and updates from users submitted via clients, typicallybrowser clients 16. Multiple instances of aknowledge access server 26 may be required to support a large corporate environment and to provide appropriate scalability; however only one knowledgesite management server 27, oneuser database 56A, and onerepository database 56B typically exist in a working system. In small scale environments, theweb server 20,knowledge access server 26, and knowledgesite management server 27, and even thee-mail server 23, may all optionally be deployed on the same physical computer. -
Figure 2 is a block diagram illustrating an embodiment, according to the present invention, of the knowledgesite management server 27. Theserver 27 is shown to include a socket front-end 40 to facilitate communication with theweb server 20 for administrative requests, arequest handler 44, aknowledge gathering system 28, aknowledge converter 24, and a variety ofspecialized controller modules 45A - 45C. Therequest handler 44, upon receiving a request from theweb server 20 via theinterface application 34 and socket front-end 40, starts a session to process the request such as, for example, a request by an authorized systems administrator to configure the behavior of theknowledge gathering system 28. - The
knowledge gathering system 28 is shown inFigure 2 to include anextraction controller 47, amail system interface 42, and aterm extractor 46 includingconfidence logic 45. Theextraction controller 47 commands themail system interface 42 to retrieve messages submitted by thee-mail client extensions 19 to theKS mailbox 25 on thee-mail server 23 for the purpose of extraction and processing. Theextraction controller 47 can request this continuously or periodically on a scheduled basis, so that messages can be processed at a convenient time when computing resources are lightly loaded, for example, overnight. Themail system interface 42 retrieves e-mail messages from thee-mail server 23 using the Simple Mail Transfer Protocol (SMTP), Post Office Protocol 3 (POP3), or Internet Message Access Protocol 4 (IMAP4) protocols. Themail system interface 42 propagates electronic documents directly to aterm extractor 46, includingconfidence logic 45, that operates to convert electronic documents into per-user knowledge profiles that are stored in aknowledge repository 50. Theterm extractor 46 may include any commercially available term extraction engine (such as "NPTOOL" from LingSoft Inc. of Helsinki, Finland, or "Themes" from Software Scientific) that analyzes the electronic document, recognizes noun phrases in the document, and converts such phrases to a canonical form for subsequent use by theconfidence logic 45 as candidate terms in a knowledge profile. - The
term extractor 46 performs a variety of the steps when parsing and decoding an electronic document, such as interpreting any special attributes or settings encoded into the header of the message of thee-mail client 18, resolving the e-mail addresses of recipients against either the built-in user database or an external user database, preprocessing the electronic document, extracting noun-phrases from the text as candidates for knowledge terms, processing these knowledge terms, and storing summary information about the document and extraction process in thedatabases term extractor 46 further detects and strips out non-original texts, attachments and in some cases the entire electronic document based on the document not meeting predetermined minimum criteria. Further details regarding the exact procedures implemented by theterm extractor 46 will be provided below. Once theterm extractor 46 has extracted the knowledge terms, theknowledge repository 50 is updated. Specifically, new terms are added, and repetitions of known terms are used to update theknowledge repository 50. - The
knowledge repository 50 is defined by a hierarchical structure of classes. The objects of these classes represent the knowledge information that includes, inter alia, user profiles (including knowledge profiles) and organizational structure, and are stored in two databases: theuser database 56A and therepository database 56B. Therepository database 56B contains profile and repository information and can use one of a number of commercial relational database management systems that support the Open DataBase Connectivity (ODBC) interface standard. Adatabase interface 54 provides a logical database-independent class API to access the physical databases and to shield the complete server codes from accessing database native API so that the server process can use any relational database management system (RDMS). Because therepository database 56A is open to inspection by systems administrators, and may be hosted on an existing corporate system, special measures may be taken to enhance the privacy of information in therepository database 56B; for example, therepository database 56B contains no actual user names or e-mail addresses, but instead may use encrypted codes to represent users in a manner that is meaningful only in combination with the user database. Theuser database 56A is a small commercial RDBMS embedded into theknowledge repository 50 in such a way that it cannot be accessed except through the interfaces offered by thesystem 10. Theuser database 56A contains encrypted identifying codes that allow the names of actual users to be associated with e-mail addresses, login IDs, passwords, and profile and repository information in the repository database. - A
lexicon controller 45C is responsible for building tables of associated terms. Terms are considered "associated" with each other to the extent that they tend to co-occur in close proximity within the documents of multiple users. Thelexicon controller 45C manages the background process of data mining that is used to discover associations between terms and record those in special association tables within therepository database 56B. - A
profile controller 45B is a module that may optionally be included within the knowledgesite management server 27, and manages a queue of pending, compute-intensive operations associated with updating profiles. Since the algorithm for the confidence level value calculation of a term (embodied in the confidence logic 45) depends on the total number of documents profiled, the confidence level value for each and every term in a user's profile is technically obsolete when any document is profiled. Theprofile controller 45B manages the "recalculation" of profiles. The actual operation is performed within theknowledge access server 26, which has aknowledge repository 50 interface. - A
case controller 45A keeps track of open cases and initiates notifications to users concerning their status. A "case" is a pending request from one user to another, as will be detailed below. For example, if a user requests an expert in a certain field via aclient browser client 16, theknowledge access server 26 matches the term against both the public and private portions of all user profiles. If a high confidence, but private, match is found, the system cannot reveal the identity of the matched person to the inquirer and must therefore open a "case". The case places a notification in the profile "home" page of the target user and/or transmits an e-mail message with a link back to that page. The target user may then (via a browser): - 1. See the identity of the inquirer and the basis of the match.
- 2. See comments added by the inquirer.
- 3. Deny the request, at which point the case is closed.
- 4. Put a block on any further matches from that person or based on that term.
- 5. Go into the profile and edit the term responsible for the match.
- 6. Indicate that the case is accepted and provide authorization to reveal the identity of the target to the inquirer.
- From the perspective of the inquirer, private matches are initially returned with a match strength only and do not reveal the name of the person or document matched. The user can then initiate cases for any or all of these private matches, based on how urgently the information is needed, how good the matches were, and whether the public matches are sufficient. Each case gets an expiration date set by the inquirer and notification options regarding how the inquirer wants to be told about the disposition of the case. Open cases are summarized in the Web area for the inquirer, along with the date and query that generated the return values. If the target denies a case, that status is communicated to the user. The user has no option to send e-mail or otherwise further identify that person. If the target accepts the case, the identity of the target is communicated to the user by updating the case record and the case is closed. Case history retention options are a site administration option.
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Figure 3 is a block diagram illustrating the components that constitute theknowledge access server 26. Theknowledge access server 26 is shown to include a socket front-end 40 to facilitate communication with the webserver interface application 34. Theknowledge access server 26 further includes arequest handler 44, aterm extractor 46, aknowledge repository 50 and adatabase interface 54 that function in a manner similar to that described above with reference to theknowledge gathering system 28. Theterm extractor 46 includescomparison logic 51, the functioning of which will be described below. Theknowledge access server 26 functions primarily as an interface between knowledge users and theknowledge repository 50. It provides services to the webserver interface application 34, which implements a number of user interfaces as described above for interacting with theknowledge repository 50. -
Figure 4 is a block diagram illustrating the components that constitute theknowledge converter 24. Theknowledge converter 24 is shown to include aterm extractor 46 that is fed from an array offormat converters 60. Theknowledge converter 24 is able to access theknowledge repository 50, and to import data from other knowledge systems, or export knowledge to other knowledge systems, via each of theformat converters 60. - Returning to
Figure 1 , theknowledge access server 26 implements the interface to theknowledge repository 50 and the knowledgesite management server 27 is shown to access theknowledge repository 50 via theknowledge access server 26.Figures 3 and 4 illustrate data for theknowledge repository 50 as residing indatabases databases general database interface 54 and provide persistent storage for the core system classes referred to above. In one embodiment of the present invention, the user database and the repository databases are implemented utilizing the Microsoft SQL server, developed by Microsoft Corp. of Redmond Washington, to provide default storage management services for the system. However, programming may be done at a more general level to allow for substitution of other production class relational database management systems, such as those developed by Sybase, Oracle or Informix. -
Figure 5 is a diagrammatic representation of a client, according to an embodiment of the present invention, in the form of ane-mail client 18. It will be appreciated that thee-mail client 18 may be any commercially available e-mail client such as a Microsoft Exchange, Outlook Express, Outlook 97/98 or Lotus Notes client. Thee-mail client 18 includes modifications or additions, in the form of theextensions 19, to the standard e-mail client to provide additional functionality. Specifically, according to an embodiment of the present invention, three subsystems are included within thee-mail client extensions 19, namely auser interface 80, aprofiling system 82, and an addressingsystem 84. - The
profiling system 82 implements properties on an originated message, as well as menu and property sheet extensions at global and message levels for users to set and manipulate these new properties. More specifically,profiling system 82 provides a user with a number of additional options that determine how amessage 85 propagated from thee-mail client 18 to theknowledge repository 50 will be processed and handled for the purposes of knowledge management. A number of the provided options are global, while others apply on a per-message basis. For example, according to one embodiment, the following per-message options (or flags) may be set by a user to define the properties of an e-mail message: - 1. An "Ignore"
flag 86 indicating the e-mail message should not be processed for these purposes of constructing or maintaining a user knowledge profile, and should not be stored. - 2. A "Repository"
parameter 88 indicating that the message may be processed for the purposes of constructing a knowledge profile and then stored in therepository 50 for subsequent access as a document by others. The "Repository"parameter 88 also indicates whether the document (as opposed to terms therein) is to be stored in a private or public portion of therepository 50. - A number of global message options may also be made available to a user for selection. For example, an e-mail address (i.e., the
KS mailbox 25 or the e-mail server 23) for theknowledge server 22 may be enabled, so that the e-mail message is propagated to theserver 22. - Actual implementation and presentation of the above per-message and global options to the user may be done by the addition of a companion application or set of software modules which interact with API's provided by e-mail clients, or modules which modify the e-mail client itself, which are available during message composition. If the user activates the Ignore
flag 86, theprofiling system 82 will not make any modifications to the message and no copy of the message will be sent to theknowledge gathering system 28 via theKS mailbox 25. Otherwise, per-message options, once obtained from the user, are encoded. Subsequently, when the user chooses to send themessage 85 using the appropriate control on theparticular e-mail client 18, the e-mail address of the knowledge gathering server is appended to the blind copy list for the message. Theprofiling system 82 encrypts and encodes the following information into the message header, for transmission to and decoding by theknowledge gathering system 28, in accordance with Internet specification RFC 1522: - 1. The list of e-mail addresses in the "to:" and "cc:" lists;
- 2. Per-message options as appropriate; and
- 3. For those recipients suggested by the addressing system 84 (see below), a short list of topic identifiers including the primary topics found within the message and the primary topics found within the user profile that formed a basis of a match.
- 4. Security information to validate the message as authentic.
- When the
message 85 is sent over the normal e-mail transport, the following events occur: - 1. Recipients on the "to:" and "cc:" lists will receive a normal message with an extra header containing the encoded and encrypted options. This header is normally not displayed by systems that read e-mail and can be ignored by recipients;
- 2. The recipients will not be aware that the knowledge gathering system has received a blind copy of the message; and
- 3. If the sender chooses to archive a copy of the
message 85, the e-mail address of theknowledge gathering system 28 will be retained in the "bcc" field as a reminder that the message was sent to the knowledge gathering server. - Further details concerning the addressing
system 86 will be discussed below. -
Figure 6 is a block diagram illustrating the structure of therepository 50, according to one embodiment of the present invention, as constructed from data contained in therepository database 56B, and theuser database 56A. Therepository 50 is shown to include a number of tables, as constructed by a relational database management system (RDBMS). Specifically, therepository 50 includes a user table 90, a term table 100, a document table 106, a user-term table 112, a term-document table 120 and a user-document table 130. The user table 90 stores information regarding users for whom knowledge profiles may be constructed, and includes anidentifier column 92, including unique keys for each entry or record within the table 90. Aname column 94 includes respective names for users for whom knowledge profiles are maintained within therepository 50. Adepartment column 96 contains a description of departments within an organization to which each of the users may be assigned, and ane-mail column 98 stores respective e-mail addresses for the users. It will be appreciated that the illustrated columns are merely exemplary, and a number of other columns, storing further information regarding users, may be included within the user table 90. - The term table 100 maintains a respective record for each term that is identified by the
term extractor 46 within an electronic document, and that is included within therepository 50. The term table 100 is shown to include anidentifier column 102, that stores a unique key for each term record, and aterm column 104 within which the actual extracted and identified terms are stored. Again, a number of further columns may optionally be included within the term table 100. The document table 106 maintains a respective record for each document that is processed by theterm extractor 46 for the purposes of extracting terms therefrom. The document table 106 is shown to include anidentifier column 108, that stores a unique key for each document record, and adocument name column 110, that stores an appropriate name for each document analyzed by theterm extractor 46. - The user-term table 112 links terms to users, and includes at least two columns, namely a
user identifier column 114, storing keys identifying users, and aterm identifier column 116, storing keys identifying terms. The user-term table 112 provides a many-to-many mapping of users to terms. For example, multiple users may be associated with a single term, and a single user may similarly be associated with multiple terms. The table 112 further includes aconfidence level column 118, which stores respective confidence level values, calculated in the manner described below, for each user-term pair. The confidence level value for each user-term pair provides an indication of how strongly the relevant term is coupled to the user, and how pertinent the term is in describing, for example, the knowledge base of the relevant user. - The term-document table 120 links terms to documents, and provides a record of which terms occurred within which document. Specifically, the term-document table 120 includes a
term identifier column 122, storing keys for terms, and adocument identifier column 124, storing keys for documents. The table 120 further includes an adjustedcount column 126, which stores values indicative of the number of occurrences of a term within a document, adjusted in the manner described below. For example, the first record within the table 120 records that the term "network." occurred within the document "e-mail 1" 2.8 times, according to the adjusted count. - The user-document table 130 links documents to users, and includes at least two columns, namely a
user identifier column 132, storing keys identifying users, and adocument identifier column 134, storing keys identifying various documents. For example, the first record within the exemplary user-document table 130 indicates that the user "Joe" is associated with the document "e-mail 1". This association may be based upon the user being the author or recipient of the relevant document. -
Figure 7 is a flow chart illustrating a method 140, according to an embodiment of the present invention, of constructing a user knowledge profile.Figure 7 illustrates broad steps that are described in further detail with reference to subsequent flow charts and drawings. The method 140 commences atstep 142, and proceeds todecision box 144, wherein a determination is made as to whether an electronic document, for example in the form of an e-mail propagated from ane-mail client 18, is indicated as being a private document. This determination may be made at thee-mail client 18 itself, at thee-mail server 23, or even within the knowledgesite management server 27. This determination may furthermore be made by ascertaining whether the Ignoreflag 86, incorporated within ane-mail message 85, is set to indicate thee-mail message 85 as private. As discussed above, the Ignoreflag 86 may be set at a users discretion utilizing theprofiling system 82, accessed via theuser interface 80 within theextensions 19 to thee-mail client 18. In the event that the electronic document is determined to be private, the method 140 terminates atstep 146, and no further processing of the electronic document occurs. Alternatively, the method 140 proceeds to step 148, where confidence level values are assigned to various terms within the electronic document. Atstep 150, a user knowledge profile is constructed utilizing the terms within the electronic document to which confidence level values were assigned atstep 148. The method 140 then terminates atstep 146. -
Figure 8 is a flow chart illustrating a high-level method 148, according to an embodiment of the present invention, by which terms may be extracted from an electronic document, and by which confidence level values may be assigned such terms. Themethod 148 comprises two primary operations, namely a term extraction operation indicated at 152, and a confidence level value assigning operation, indicated at a 154. Themethod 148 implements one methodology by which thestep 148 shown inFigure 7 may be accomplished. Themethod 148 begins atstep 160, and then proceeds to step 162, where an electronic document, such as for example an e-mail, a database query, a HTML document and or a database query, is received at the knowledgesite management server 27 via themail system interface 42. For the purposes of explanation, the present example will assume that an e-mail message, addressed to theKS mailbox 25, is received at the knowledgesite management server 27 via themail system interface 42, from thee-mail server 23. Atstep 164, terms and associated information are extracted from the electronic document. Specifically, the e-mail message is propagated from themail system interface 42 to theterm extractor 46, which then extracts terms in the form of, for example, grammar terms, noun phrases, word collections or single words from the e-mail message. Theterm extractor 46 may further parse a header portion of the e-mail to extract information therefrom that is required for the maintenance of both the repository anduser databases term extractor 46 will identify the date of transmission of the e-mail, and all addressees. Theterm extractor 46 will additionally determine further information regarding the electronic document and terms therein. For example, theterm extractor 46 will determine the total number of words comprising the electronic document, the density of recurring words within the document, the length of each term (i.e., the number of words that constitute the term), the part of speech that each word within the document constitutes, and a word type (e.g., whether the word is a lexicon term). To this end, theterm extractor 46 is shown inFigure 2 to have access to adatabase 49 of lexicon terms, which may identify both universal lexicon terms and environment lexicon terms specific to an environment within which the knowledgesite management server 27 is being employed. For example, within a manufacturing environment, the collection of environment lexicon terms will clearly differ from the lexicon terms within an accounting environment. - Following the actual term extraction, a first relevancy indicator in the form of an adjusted count value is calculated for each term within the context of the electronic document at
step 168. Atstep 170, a second relevancy indicator in the form of a confidence level is calculated for each term within the context of multiple electronic documents associated with a particular user. Furtherdetails regarding steps method 148 then terminates atstep 172. -
Figures 9A is a flow chart illustrating amethod 154, according to an embodiment of the present invention, of determining a confidence level for a term extracted from an electronic document. Following thecommencement step 180, a term and associated information is received at theconfidence logic 45, included within theterm extractor 46. While theconfidence logic 45 is shown to be embodied in theterm extractor 46 inFigure 2 , it will be appreciated that theconfidence logic 45 may exist independently and separately of theterm extractor 46. The associated information may include the following parameters: - 1. A count value indicating the number of occurrences of the term within a single electronic document under consideration;
- 2. A density value, expressed as a percentage, indicating the number of occurrences of the term relative to the total number of terms within the electronic document;
- 3. A length of value indicating the total number of words included within the relevant term;
- 4. A Part of Speech indication indicating the parts of speech that words included within the term comprise (e.g., nouns, verbs, adjectives, or adverbs); and
- 5. A Type indication indicating whether the term comprises a universal lexicon term, an environment lexicon term, or is of unknown grammatical structure.
- At
step 184, a "binding strength", indicative of how closely the term is coupled to the electronic document under consideration, is determined. While this determination may be made in any number of ways,Figure 10 shows an exemplary term-document binding table 200, utilizing which a class may be assigned to each of the extracted terms. Specifically, the term-document binding table 200 is shown to include three columns, namely a "number of occurrences"column 202, adensity column 204, and an assignedclass column 206. A term having a density value of greater than four percent, for example, is identified as falling in the "A" class, a term having a density of between two and four percent is identified as falling in the "B" class, a term having a density of between one and two percent is identified as falling in the "C" class, while a term having a density of between 0.5 and one percent is identified as falling in the "D class. For the terms having a density of above 0.5 percent, the density value is utilized to assign a class. For terms which have a density value less than 0.5 percent, the count value is utilized for this purpose. Specifically, a term having a count value of greater than 3 is assigned to the "E" class, and a term having a count value of between 1 and 3 is assigned to the "F" class. Accordingly, the assigned class is indicative of the "binding strength" with which the term is associated with or coupled to the electronic document under consideration. - At
step 186, a characteristic (or qualitative) indicator in the form of a term weight value is determined, based on characteristics qualities of the term such as those represented by the Type and Part of Speech indications discussed above. While this determination may again be made in any number of ways,Figure 11 shows an exemplary weight table 210, utilizing which a weight value may be assigned to each of the extracted terms. Specifically, the weight table 210 is shown to include four columns, namely aweight column 212, atype column 214, alength column 216 and a Part ofSpeech column 218. By identifying an appropriate combination of type, length and Part of Speech indications, an appropriate term weight value is assigned to each term. In thetype column 214, a type "P" indication identifies an environment lexicon term, a type "L" indication identifies a universal lexicon term, and a type "U" indication identifies a term of unknown grammatical structure for a given length. The entries within thelength column 216 indicate the number of words included within the term. The entries within the Part ofSpeech column 218 indicate the parts of speech that the words within a term comprise. The "A" indication identifies the adjectives, the "V" indication identifies a verb, the "N" indication identifies a noun, and the "X" indication identifies an unknown part of speech. By mapping a specific term to an appropriate entry within the weight table 210, an appropriate term weight value, as indicated in theweight column 212, may be assigned to the term. - At
step 188, a relevancy quantitative indicator in the form of an adjusted count value for each term, is calculated, this adjusted count value being derived from the binding strength and term weight values calculated atsteps Figure 12 shows an exemplary occurrence factor table 220, utilizing which an adjusted count value for the relevant term may be determined. The occurrence factor table 220 is shown to include values for various binding strength/term weight value combinations. The adjusted count value is indicative of the importance or relevance of term within a single, given document, and does not consider the importance or relevance of the term in view of any occurrences of the term in other electronic documents that may be associated with a particular user. - At
step 190, a determination is made as to whether any adjusted count values exists for the relevant term as a result of the occurrence of the term in previously received and analyzed documents. If so, the adjusted count values for occurrences of the term in all such previous documents are summed. - At
step 192, an initial confidence level values for the term is then determined based on the summed adjusted counts and the term weight, as determined above with reference to the weight table 210 shown inFigure 11 . To this end,Figure 13 illustrates a confidence level table 230, which includes various initial confidence level values for various summed adjusted count/weight value combinations that may have been determined for a term. For example, a term having a summed adjusted count of 0.125, and a weight value of 300, may be allocated an initial confidence level value of 11.5. Following the determination of an initial confidence level value, confidence level values for various terms may be grouped into "classes", which still retain cardinal meaning, but which standardize the confidence levels into a finite number of "confidence bands".Figure 14 illustrates a modified table 240, derived from the confidence level table 230, wherein the initial confidence levels assigned are either rounded up or rounded down to certain values. By grouping into classes by rounding, applications (like e-mail addressing), can make use of the classes without specific knowledge/dependence on the numerical values. These can then be tuned without impact to the applications. The modified confidence level values included within the table 240 may have significance in a number of applications. For example, users may request that terms with a confidence level of greater than 1000 automatically be published in a "public" portion of their user knowledge profile. Further, e-mail addressees for a particular e-mail may be suggested based on a match between a term in the e-mail and a term within the user knowledge profile having a confidence level value of greater than, merely for example, 600. - The
method 154 then terminates atstep 194. - In a further embodiment of the present invention, the
method 154, illustrated inFigure 9A , may be supplemented by a number ofadditional steps 195, as illustrated inFigure 9B , by which a "document weight" value is assigned to a document based on addressee information associated with the document. The document weight value may be utilized in any one of the steps 182-192 illustrated inFigure 9A , for example, as a multiplying factor to calculate a confidence level value for a term. In one embodiment, the binding strength value, as determined atstep 184, may be multiplied by the document weight value. In another embodiment, the term weight value, as determined atstep 186, may be multiplied by the document weight value. - The document weight value may be calculated by the
confidence logic 45 within theterm extractor 46. Referring toFigure 9B , atstep 196, theconfidence logic 45 identifies the actual addressee information. To this end, theterm extractor 46 may include a header parser (not shown) that extracts and identifies the relevant addressee informations. Atstep 197, theconfidence logic 45 then accesses a directory structure that may be maintained by an external communication program for the purposes of determining the level of seniority within an organization of the addressees associated with the document. In one embodiment of the invention, the directory structure may be a Lightweight Directory Access Protocol (LDAP) directory maintained by a groupware server, such as Microsoft Exchange or Lotus Notes. Atstep 198, a cumulative seniority level for the various addressees is determined by summing seniority values for each of the addressees. Atstep 199, the summed seniority value is scaled to generate the document weight value. In this embodiment, the cumulative or summed seniority level of the various addressees comprises an "average" seniority value that is used for the purpose of calculating the document weight term. Alternatively, instead of summing in the seniority values atstep 198, a "peak" seniority value (i.e., a seniority value based on the seniority level of the most senior addressee) may be identified and scaled atstep 199 to generate the document weight value. - In alternative embodiments, the addressee information may be utilized in a different manner to generate a document weight value. Specifically, a document weight value may be calculated based on the number of addressees, with a higher number of addressees resulting in a greater document weight value. Similarly, a document weight value may be calculated based on the number of addressees who are included within a specific organizational boundary (e.g., a specific department or division). For example, an e-mail message addressed primarily to an executive group may be assigned a greater document weight value than an e-mail message addressed primarily to a group of subordinates. Further, the document weight value may also be calculated using any combination of the above discussed addressee information characteristics. For example, the document weight value could be calculated using both addressee seniority and addressee number information.
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Figure 15A is a flow chart illustrating amethod 250, according to one embodiment of the present invention, of constructing a user profile that includes first and second portions that may conveniently be identified as "private" and "public" portions. Specifically, unrestricted access to the "public" portion of the user knowledge profile may be provided to other users, while restricted access to the "private," portion may be facilitated. For example, unrestricted access may encompass allowing a user to review details concerning a user knowledge profile, and the target user, responsive to a specific request and without specific authorization from the target user. Restricted access, on the other hand, may require specific authorization by the target user for the provision of information concerning the user knowledge profile, and the target user, in response to a specific request. Themethod 250 commences atstep 252, and then proceeds to step 254, where a determination is made regarding the confidence level value assigned to a term, for example using themethod 154 described above with reference toFigure 9A . Having determined the confidence level value, themethod 250 proceeds to step 256, where a threshold value is determined. The threshold value may either be a default value, or a user specified value, and is utilized to categorize the relevant term. For example, users may set the threshold through the browser interface as a fundamental configuration for their profile. If set low, the user profile will be aggressively published to the public side. If set high, only terms with a high level of confidence will be published. Users can also elect to bypass the threshold publishing concept altogether, manually reviewing each term that crosses the threshold (via the notification manager) and then deciding whether to publish. Atdecision box 258, a determination is made as to whether the confidence level value for the term is less than the threshold value. If so, this may be indicative of a degree of uncertainty regarding the term as being an accurate descriptor of a user's knowledge. Accordingly, atstep 260, the relevant term is then stored in the "private" portion of the user knowledge profile. Alternatively, should the confidence level value be greater than the threshold value, this may be indicative of a greater degree of certainty regarding the term as an accurate descriptor of a user's knowledge, and the relevant term is then stored in the "public" portion of the user's knowledge profile atstep 262. Themethod 150 then terminates atstep 264. -
Figure 16A shows an exemplary user-term table 112, constructed according to themethod 250 illustrated inFigure 15A . Specifically, the table 112 is shown to include a firstuser knowledge profile 270 and a seconduser knowledge profile 280. The firstuser knowledge profile 270 is shown to include a "public"portion 272, and a "private"portion 274, the terms within the "private"portion 274 having an assigned confidence level value (as indicated in the confidence level column 118) below a threshold value of 300. The seconduser knowledge profile 280 similarly has a "public"portion 282 and a "private"portion 284. - The exemplary user-term table 112 shown in
Figure 16A comprises the table 112 in which the public and private portions are determined dynamically with reference to a confidence level value assigned to a particular user-term pairing.Figure 16B illustrates an alternative of the user-term table 112 that includes a "private flag"column 119, within which a user-term pairing may be identified as being either public or private, and accordingly part of either the public or private portion of a specific user profile. While the state of a private flag associated with a particular user-term pairing may be determined exclusively by the confidence level associated with the pairing, in an alternative of the invention, the state of this flag may be set by other mechanisms. For example, as described in further detail below with reference toFigure 17E , a user may be provided with the opportunity manually to modify the private or public designation of a term (i.e., move a term between the public and private portions of a user knowledge profile). A user may be provided with an opportunity to modify the private or public designation of a term in response to a number of events. Merely for example, a user may be prompted to designate a term as public in response to a "hit" upon a term in the private portion during a query process, such as during an "expert-lookup" query or during an "addressee-lookup" query. When storing the term in the user knowledge profile at eithersteps column 119 within the user-term table 112, as illustrated inFigure 16B . For example, a logical "1" entry within the "private flag"column 119 may identify the associated term as being in the "private" portion of the relevant user knowledge profile, while a logical "0" entry within the "private flag"column 119 may identify the associated term as being in the "public" portion of the relevant user knowledge profile. -
Figure 15B illustrates anexemplary method 260/262 of storing a term in either a public or private portion of a user knowledge profile. Specifically, a respective term is added to a notification list at step 1264, following the determination made atdecision box 258, as illustrated inFigure 15A . Atdecision box 1268, a determination is made as to whether a predetermined number of terms have been accumulated within the notification list, or whether a predetermined time period has passed. If these conditions are not met, the method waits for additional terms to be added to the notification list, or for further time to pass, atstep 1266, before looping back to the step 1264. On the other hand, should a condition within thedecision box 1268 have been met, the method proceeds to step 1270, where the notification list, that includes a predetermined number of terms that are to be added to the user knowledge profile, is displayed to a user. The notification list may be provided to the user in the form of an e-mail message, or alternatively the user may be directed to a web site (e.g., by a URL included within e-mail message) that displays the notification list. The notification list may be displayed on a web or intranet page that is frequently accessed by the user, such as a home page. Atstep 1272, the user then selects terms that are to be included in the public portion of the user knowledge profile. For example, the user may select appropriate buttons displayed alongside the various terms within the notification list to identify terms for either the public or private portions of the user knowledge profile. Atstep 1274, private flags, such as those contained within the "private flag"column 119 of the user-term table 112 as shown inFigure 16B , may be set to a logical zero "0" to indicate that the terms selected by the user are included within the public portion. Similarly, private flags may be set to a logical one "1" to indicate terms that were not selected by the user for inclusion within the public portion are by default included within the private portion. It will of course be appreciated that the user may, atstep 1272, select terms to be included within the private portion, in which case un-selected terms will by default be included within the public portion. The method then ends atstep 1280. - The above described method is advantageous in that a user is not required to remember routinely to update his or her user profile, but is instead periodically notified of terms that are candidates for inclusion within his or her user knowledge profile. Upon notification, the user may then select terms for inclusion within the respective public and private portions of the user knowledge profile. As such, the method may be viewed as a "push" model for profile maintenance.
- While the
above method 250 is described as being executed at the time of construction of a user knowledge profile, it will readily be appreciated that the method may be dynamically implemented as required and in response to a specific query, with a view to determining whether at least a portion of a user knowledge profile should be published, or remain private responsive to the relevant query. To this end,Figure 17A shows a flow chart illustrating amethod 300, according to one embodiment of the present invention, of facilitating access to a user knowledge profile. Themethod 300 commences atstep 302, and then proceeds to step 304, where a threshold value is determined. Atstep 306, a document term within an electronic document generated by a user (hereinafter referred to as a "query" user) is identified. Step 306 is performed by theterm extractor 46 responsive, for example, to the receipt of an e-mail from themail system interface 42 within theknowledge gathering system 28. Atstep 308,comparison logic 51 within theterm extractor 46 identifies a knowledge term within therepository 50 corresponding to the document term identified atstep 306. Thecomparison logic 51 also determines a confidence level value for the identified knowledge term. Atdecision box 310, thecomparison logic 51 makes a determination as to whether the confidence level value for the knowledge term identified atstep 308 is less than the threshold value identified atstep 304. If not (that is the confidence level value is greater than the threshold value) then a public profile process is executed atstep 312. Alternatively, a private profile process is executed atstep 314 if the confidence level value falls below the threshold value. Themethod 300 then terminates atstep 316. -
Figure 17B shows a flowchart illustrating analternative method 301, according to an embodiment of the present invention, of facilitating access to a user knowledge profile. Themethod 301 commences atstep 302, and then proceeds to step 306, where a document term within an electronic document generated by a user (i.e., the "query" user) is identified. Theterm extractor 46 performsstep 306 responsive, for example, to the receipt of an e-mail message from themail system interface 42 within theknowledge gathering system 28. Atstep 308, thecomparison logic 51 within theterm extractor 46 identifies a knowledge term within theknowledge repository 50 corresponding to the document term identified atstep 306. Atdecision box 311, thecomparison logic 51 then makes a determination as to whether a "private" flag for the knowledge term is set to indicate the relevant knowledge term as being either in the public or the private portion of a user knowledge profile. Specifically, thecomparison logic 51 may examine the content of an entry in theprivate flag column 112 of a user-term table for a specific user-term pairing of which the knowledge term is a component. If the "private" flag for the knowledge term is set, thus indicating the knowledge term as being in the private portion of a user knowledge profile, the private profile process is executed atstep 314. Alternatively, the public profile process is executed atstep 312. Themethod 301 then terminates atstep 316. -
Figure 17C shows a flow chart detailing amethod 312, according to an embodiment of the present invention, of performing the public profile process mentioned inFigures 17A and17B . Themethod 312 commences atstep 320, and user information, the knowledge term corresponding to the document term, and the confidence level value assigned to the relevant knowledge term are retrieved atsteps step 328, whereafter themethod 312 terminates atstep 330. -
Figure 17D shows a flow chart detailing amethod 314, according to an embodiment of the present invention, of performing the private profile process mentioned inFigures 17A and17B . Themethod 314 commences atstep 340, and proceeds to step 342, where a user (herein after referred to as the "target" user) who is the owner of the knowledge profile against which the hit occurred is notified of the query hit. This notification may occur in any one of a number of ways, such as for example via an e-mail message. Such an e-mail message may further include a URL pointing to a network location at which further information regarding the query hit, as well as a number of target user options, may be presented. Atstep 346, the reasons for the query hit are displayed to the target user. Such reasons may include, for example, matching, or similar, document and knowledge terms utilizing which the hit was identified and the confidence level value associated with the knowledge term. These reasons may furthermore be presented within the e-mail propagated atstep 342, or at the network location identified by the URL embedded within the e-mail. Atstep 348, the target user then exercises a number of target user options. For example, the target user may elect to reject the hit, accept the hit, and/or modify his or her user knowledge profile in light of the hit. Specifically, the target user may wish to "move" certain terms between the public and private portions of the user knowledge profile. Further, the user may optionally delete certain terms from the user knowledge profile in order to avoid any further occurrences of hits on such terms. These target user options may furthermore be exercised via a HTML document at the network location identified by the URL. Atdecision box 350, a determination is made as to whether the user elected to modify the user knowledge profile. If so, a profile modification process, which is described below with reference toFigure 17E , is executed atstep 352. Otherwise, a determination is made atdecision box 354 as to whether the target user rejected the hit. If so, the hit is de-registered atstep 356. Alternatively, if the target user accepted the hit, the public profile process described above with reference toFigure 17C is executed atstep 358. Themethod 314 then terminates at step 360. -
Figure 17E is a flowchart illustrating amethod 352, according to an embodiment of the present invention, for implementing the profile modification process illustrated atstep 352 inFigure 17D . Themethod 352 commences atstep 362, and then proceeds to displaystep 364, where the target user is prompted to (1) move a term, on which a "hit" has occurred, between the private and public portions of his or her user knowledge profile, or to (2) delete the relevant term from his or her user knowledge profile. Specifically, the target user may be presented with a user dialog, a HTML-enriched e-mail message, or a Web page, listing the various terms upon which hits occurred as a result of an inquiry, besides which appropriate buttons are displayed that allow the user to designate the term either to the included in the public or private portion of his or her user knowledge profile, or that allow the user to mark the relevant term for deletion from the user knowledge profile. Atinput step 366, the target user makes selections regarding the terms in the matter described above. Atdecision box 368, a determination is made as to whether the user selected terms for transfer between the public and private portions of the user profile, or for inclusion within the user profile. If so, themethod 352 proceeds to step 370, wherein the appropriate terms are designated as being either public or private, in accordance with the user selection, by setting appropriate values in the "private flag"column 119 within the user-term table, as illustrated inFigure 16B . Thereafter, the method proceeds todecision box 372, wherein a determination is made as to whether the user has elected to delete any of the terms presented atstep 364. If so, the relevant terms are deleted from the user knowledge profile atstep 374. The method is then terminates atstep 378. - The methodologies described above with reference to
Figures 15 through 17E are advantageous in that, where the confidence level of a term falls below a predetermined threshold, the owner of the user knowledge profile may elect to be involved in the process of determining whether a query hit is accurate or inaccurate. The owner of the user knowledge profile is also afforded the opportunity to update and modify his or her knowledge profile as and when needed. Further, the owner of the user knowledge profile is only engaged in the process for hits below a predetermined certainty level and on a public portion of the knowledge profile. Matches between document terms and knowledge terms in the public portion are automatically processed, without any manual involvement. - Returning now briefly to
Figure 5 , the addressingsystem 84 within thee-mail client extensions 19 operates independently of theprofiling system 82 to suggest potential recipients for an e-mail message based on the content thereof. Theuser interface 80 within thee-mail client extensions 19 may pop-up a window when the system determines such suggestion is possibly, based on the length of a draft message being sent, or may present a command button labelled "suggest Recipients". This button is user selectable to initiate a sequence of operations whereby the author of the e-mail is presented with a list of potential recipients who may be interested in receiving the e-mail based on predetermined criteria, such as a match between the content of the e-mail and a user profile, or a commonality with a confirmed addressee. -
Figure 18A is a flow chart illustrating amethod 400, according to an embodiment of the present invention, of addressing an electronic document, such as an e-mail, for transmission over a network, such as the Internet or an Intranet. Themethod 400 commences atstep 402, and then proceeds to step 401, where a determination is made as to whether the body of the draft message exceeds a predetermined length (or number of words). If so, content of the electronic document (e.g., an e-mail message body) is transmitted to theknowledge access server 26 via theweb server 20 atstep 404. Specifically, a socket connection is open between thee-mail client 18 and theweb server 20, and the content of the message body, which may still be in draft form, is transmitted using the Hypertext Transfer Protocol (HTTP) via theweb server 20 to theknowledge access server 26. Atstep 406, theknowledge access server 26 processes the message body, as will be described in further detail bellow. Atstep 408, theknowledge access server 26 transmits a potential or proposed recipient list and associated information to the addressingsystem 84 of thee-mail client 18. Specifically, the information transmitted to thee-mail client 18 may include the Following: - 1. A list of user names, as listed within
column 94 of the user table 90, as well as corresponding e-mail addresses, as listed within thecolumn 98 of the user table 90; - 2. A list of term identifiers, as listed in
column 116 of the user-term table 112, that were located within the "public" portion of a user knowledge profile that formed the basis for a match between document terms within the message body and knowledge terms within the user knowledge profile; and - 3. A "matching metric" for each user included in the list of user names (1). Each "matching metric" comprises the sum of the confidence level values, each multiplied by the weighted occurrences of the term within the message body, for the terms identified by the list of term identifiers (2) and associated with the relevant user. This "matching metric" is indicative of the strength of the recommendation by the
knowledge access server 26 that the relevant user (i.e., potential recipient) be included within the list of confirmed addressees. - At
step 410, the author of the electronic document is presented with a list of potential recipients by thee-mail client 18, and specifically by the addressingsystem 84 via auser dialog 440 as shown inFigure 18D. Figure 18D groups matching levels into matching classes each characterized by a visual representation (icon). - The
user dialog 440 shown inFigure 18D presents the list of potential recipients in a "potential recipients" scrollingwindow 442, wherein the names of potential recipients are grouped into levels or ranked classes according to the strength of the matching metric. An icon is also associated with each user name, and provides an indication of the strength of the recommendation of the relevant potential recipients. Merely for example, a fully shaded circle may indicate a high recommendation, with various degrees of "blackening" or darkening of a circle indicating lesser degrees of recommendation. A "rejection" icon may be associated with an actual recipient, and an example of such a "rejection" icon is indicated at 441. The "rejection" icon indicates a negative recommendation on an actual recipient supplied by the author of the message, and may be provided in response to a user manually modifying his or her profile to designate certain terms therein as generating such a "rejection" status for a recipient against which a hit occurs. - The
user dialog 440 also presents a list of actual (or confirmed) recipients in three windows, namely a "to:"window 442, a "cc:"window 444 and a "bcc:"window 446. An inquiring user may move recipients between the potential recipients list and the actual recipients lists utilizing the "Add" and "Remove" buttons indicated at 450. Theuser dialog 440 also includes an array of "select"buttons 452, utilizing which a user can determine the recommendation group to be displayed within the scrollingwindow 442. Theuser dialog 440 finally also includes "Explained Match" and "More"buttons Figure 18D , the author user may select an "Explain" function for any of the proposed recipients utilizing the "Explain Match"button 454. If it is determined atdecision box 412 that this "Explain" function has been selected, themethod 400 branches to step 414, as illustrated inFigure 18B . Specifically, atstep 414, the addressingsystem 84 propagates a further "Explain" query to theknowledge access server 26 utilizing HTTP, and opens a browser window within which to display the results of the query. Atstep 416, theknowledge access server 26 retrieves the terms (i.e., the knowledge terms) that constituted the basis for the match, as well as associated confidence level values. This information is retrieved from the public portion of the relevant user knowledge profile in theknowledge repository 50. Atstep 418, the information retrieved atstep 416 is propagated to theclient 18 from theknowledge access server 26 via theweb server 20. The information is then displayed within the browser window opened by thee-mail client 18 atstep 414. Accordingly, the author user is thus able to ascertain the reason for the proposal of a potential recipient by the addressingsystem 84, and to make a more informed decision as to whether the proposed recipient should be included within the actual recipients (confirmed addressee) list. - The user also has the option of initiating a "More" function by selecting the "More"
button 456 on theuser dialog 440, this function serving to provide the user with additional proposed recipients. Accordingly, a determination is made atstep 422 as to whether the "More" function has been selected by the author user. If so, themethod 400 branches to step 424 as shown inFigure 18C , where theclient 18 propagates a "More" request to theknowledge access server 20 in the same manner as the "Explain" query was propagated to the knowledge access server atstep 414. Atstep 46, theknowledge access server 26 identifies further potential recipients, for example, by using a threshold value for the "matching metric" that is lower than a threshold value utilized as a cutoff during the initial information retrieval operation performed atsteps step 428, theknowledge access server 26 then transmits the list of further potential recipients, and associated information, to thee-mail client 18. Atstep 430, the list of additional potential recipients is presented to the author user for selection in descending order according to the "matching metric" associated with each of the potential recipients. - At
step 432, the user then adds at his or her option, or deletes selected potential or "rejected" recipients to the list of actual recipients identified in "to:", "cc:" or "bcc:" lists of the e-mail, thus altering the status of the potential recipients to actual recipients. Atstep 434, the e-mail message is then transmitted to the confirmed addressees. - If the user profile includes a "rejection" status on a term (something a user can do through manual modification of the profile), then a special symbol, such as that indicated 441 in
Figure 18D , may be returned indicating a negative recommendation on a recipient supplied by the author of the message. - The
exemplary method 400 discussed above is advantageous in that theknowledge access server 26 automatically provides the author user with a list of potential addressees, based on a matching between document terms identified within the message body of an e-mail and knowledge terms included within user profiles. -
Figure 19 is a flow chart illustrating amethod 500 of managing user authorization to publish, or permit access to, a user knowledge profile. Themethod 500 is executed by thecase controller 45A that tracks open "cases" and initiates notification to users concerning the status of such cases. For the purposes of the present specification, the term "case" may be taken to refer to a user authorization process for publication of, or access to, a user knowledge profile. Themethod 500 commences atstep 502, and then proceeds to step 504, where a match is detected with a private portion of a user knowledge profile. Atstep 504, thecase controller 45A then opens a case, and notifies the target user atstep 506 concerning the "hits" or matches between a document (or query) term and a knowledge term in a knowledge user profile. This notification may be by way of an e-mail message, or by way of publication of information on a Web page accessed by the user. Atstep 508, thecase controller 45A determines whether an expiration date, by which the target user is required to respond to the hit, has been reached or in fact passed. If the expiration date has passed, thecase controller 45A closes the case and themethod 500 terminates. Alternatively, a determination is made atdecision box 510 as to whether the target user has responded to the notification by authorizing publication of, or access to, his or her user knowledge profile based on the hit on the private portion thereof. If the target user has not authorized such action (i.e., declined authorization), an inquiring user (e.g., the author user of an e-mail or a user performing a manual database search to locate an expert) is notified of the decline atstep 512. Alternatively, should the target user have authorized publication or access, the inquiring user is similarly notified of the authorization atstep 514. The notification of the inquiring user atsteps step 516, the appropriate portions of the user profile pertaining to the target user are published to the inquiring user, or the inquiring user is otherwise permitted access to the user profile. Atstep 518, thecase controller 45A then closes the case, whereafter the method terminates. -
Figures 7-9 describe an exemplary method 140 of identifying knowledge terms and calculating associated confidence level values. Asupplemental method 550, according to an embodiment of the present invention, of assigning a confidence value to a term will now be described with reference toFigures 20 - 22 . Thesupplemental method 550 seeks to compensate for a low confidence level value which may be associated with the term as a result of the term not appearing in any recent documents associated with a user. It will be appreciated that by calculating a confidence level value utilizing the method illustrated inFigure 9 , aged terms (i.e., terms which have not appeared in recent documents) may be attributed a low confidence level value even though they may be highly descriptive of a specialization or knowledge of a user. The situation may occur where a user is particularly active with respect to a particular topic for a short period of time, and then re-focuses attention on another topic. Over time, the methodology illustrated inFigure 9 may too rapidly lower the confidence level values associated with terms indicating user knowledge. - Referring to
Figure 20 , there is illustrated theexemplary method 550 of assigning a confidence value to a term. Themethod 550 commences atstep 552, whereafter an initial confidence memory value (as distinct from a confidence level value) is assigned a zero (0) value. Atstep 556, a confidence level value for a term is calculated utilizing, for example, themethod 154 illustrates inFigure 9 . However, this confidence level value is atstep 190 within themethod 154, the adjusted count values for only documents received within a predetermined time (e.g., the past 30 days), or only for a predetermined number of documents (e.g., the last 30 documents) are utilized to calculate the summed adjusted count value. It will be appreciated that by discarding documents, which occurred before the time or document window, the effect on the confidence level values for aged terms by the absence of such aged terms within recent documents may be reduced. - At
decision box 558, a determination is then made as to whether a newly calculated confidence level value for a term is greater than a previously recorded confidence memory value, or alternatively greater than a predetermined site-wide or system-wide threshold value. If the confidence level value is determined to be greater than the confidence memory value (or the threshold value), the confidence memory value is then made equal to the confidence level value by overwriting the previous confidence memory value with the newly calculated confidence level value. In this way, it is ensured that the confidence level value does not exceed the confidence memory value. -
Figure 22 is an exemplary user-term table 112 that is shown to include aconfidence level column 118, a confidencememory value column 121, and atime stamp column 123. The table 122 records a confidence level value and a confidence memory value for each user-term pairing within the table 112, and it is to this table that the confidence level values and the confidence memory values are written by themethod 550. Thetime stamp column 123 records a date and time stamp value indicative of the date and time at which the corresponding confidence memory value was last updated. This value will accordingly be updated upon the overwriting of the confidence memory value atstep 560. - Should the confidence level value not exceed the confidence memory value or the threshold value, as determined at
decision box 558, themethod 550 then proceeds todecision box 562, where a further determination is made as to whether another time or document window, associated with a step of decaying the confidence memory value, has expired. If not, the confidence memory value is left unchanged atstep 564. Alternatively, if the time or document window associated with the decay step has expired, the confidence memory value is decayed by a predetermined value or percentage atstep 566. For example, the confidence memory value may be decayed by five (5) percent per month. The time stamp value may be utilized to determine the window associated with the decay step. The time stamp value associated with the decayed confidence memory value is also updated atstep 566. Themethod 550 then terminates atstep 568. -
Figure 21 is a flowchart illustrating anexemplary method 570 of determining or identifying a confidence value (e.g., either a confidence level value or a confidence memory value) for a term. Themethod 570 may be executed in performance of any of the steps described in the preceding flow charts that require the identification of a confidence level value for a term in response to a hit on the term by a document term (e.g., in an electronic document or other query). Themethod 570 commences atstep 572, and proceeds to step 574, where a confidence level value for a term within a user profile is identified. For example, the confidence level value may be identified within be user-term table 112 illustrated inFigure 22 . Atstep 576, a confidence memory value for the term may then also be identified, again by referencing the user-term table 112 illustrated inFigure 22 . Atdecision box 578, a determination is then made as to whether the confidence level value is greater than the confidence memory value. If the confidence level value is greater than the confidence memory value, the confidence level value is returned, atstep 580, as the confidence value. Alternatively, should the confidence memory value be greater than the confidence level value, the confidence memory value is returned, atstep 582, as the confidence value. Themethod 570 then terminates atstep 584. - Accordingly, by controlling the rate at which a confidence value for a term is lowered or decayed, the present invention seeks to prevent having a potentially relevant term ignored or overlooked.
-
Figure 23 is a diagrammatic representation of a machine in the form ofcomputer system 600 within which software, in the form of a series of machine-readable instructions, for performing any one of the methods discussed above may be executed. Thecomputer system 600 includes aprocessor 602, amain memory 603 and astatic memory 604, which communicate via abus 606. Thecomputer system 600 is further shown to include a video display unit 608 (e.g., a liquid crystal display (LCD) or a cathode ray tube (CRT)). Thecomputer system 600 also includes an alphanumeric input device 610 (e.g., a keyboard), a cursor control device 612 (e.g., a mouse), adisk drive unit 614, a signal generation device 616 (e.g., a speaker) and anetwork interface device 618. Thedisk drive unit 614 accommodates a machine-readable medium 615 on whichsoftware 620 embodying any one of the methods described above is stored. Thesoftware 620 is shown to also reside, completely or at least partially, within themain memory 603 and/or within theprocessor 602. Thesoftware 620 may furthermore be transmitted or received by thenetwork interface device 618. For the purposes of the present specification, the term "machine-readable medium" shall be taken to include any medium that is capable of storing or encoding a sequence of instructions for execution by a machine, such as thecomputer system 600, and that causes the machine to performing the methods of the present invention. The term "machine-readable medium" shall be taken to include, but not be limited to, solid-state memories, optical and magnetic disks, and carrier wave signals. - Thus, a method and apparatus for constructing and maintaining a user knowledge profile have been described. Although the present invention has been described with reference to specific examples and embodiments, it will be evident that various modifications and changes may be made to these embodiments without departing from the scope of the invention. Accordingly, the specification and drawings are to be regarded in an illustrative rather than a restrictive sense.
Claims (23)
- A method of constructing a user profile, the method including:automatically assigning a confidence level (148) to content within an electronic document associated with a first user, the content being potentially indicative of a characteristic of the first user; andstoring the content (150, 250) in either a first or a second portion of a user profile of the first user according to the assigned confidence level, (258) wherein the first and the second portions of the user profile of the first user have different access restrictions (260, 262) with respect to a second user's authorization for the provision of information from the user profile of the first user.
- The method of claim 1 wherein access to the first portion of the user profile by the second user is unrestricted (312), wherein unrestricted access does not require specific authorization from the first user for the provision of information from the first portion of the user profile of the first user, and the storing comprises storing the content in the first portion (262) if the confidence level exceeds a predetermined threshold.
- The method of claim 2 wherein access to the second portion of the user profile by the second user is restricted (314), wherein restricted access requires specific authorization by the first user for the provision of information from the second portion of the user profile of the first user, and the storing comprises storing the content in the second portion (260) if the confidence level is below the predetermined threshold.
- The method of claim 1 including designating the first portion (262) of the user profile of the first user as a public portion and designating the second portion (260) of the user profile of the first user as a private portion.
- The method of claim 1 including determining whether the electronic document is indicated (88) by the first user as being for use in construction of the user profile.
- The method of claim 1 including determining whether the electronic document indicates (88) an attachment as being for use in the construction of the user profile of the first user.
- The method of claim 1 wherein automatically assigning the confidence level comprises identifying a term (164) within the content.
- The method of claim 7 wherein the term comprises any one of a group consisting of a grammar term, a noun phrase and a word.
- The method of claim 1 wherein automatically assigning the confidence level includes analyzing addressee information (195) associated with the electronic document.
- The method of claim 1 wherein the storing of the content includes notifying (1270) the first user of the content, prior to storing the content in either the first or second portion of the user profile of the first user.
- The method of claim 10 wherein notifying the first user includes determining whether the confidence level automatically assigned to the content exceeds a predetermined threshold (258), and notifying the first user of the content when the confidence level exceeds the predetermined threshold.
- A system for constructing a user profile, the system comprising:confidence logic (45) to examine an electronic document, associated with a first user, and to assign a confidence level (148) to content within the electronic document, the content being potentially indicative of a characteristic of the first user; anda profiler (46) to store the content (150, 250) in either the first or second portion of the user profile of the first user according to the assigned confidence level (258), wherein the first and second portions of the user profile of the first user have different access restrictions (260, 262) with respect to a second user's authorization for the provision of information from the user profile of the first user.
- The system of claim 12 wherein access to the first portion of the user profile by the second user is unrestricted (312), wherein unrestricted access does not require specific authorization from the first user for the provision of information from the first portion of the user profile of the first user, and the profiler stores the content in the first portion (262) if the confidence level exceeds a predetermined threshold.
- The system of claim 13 wherein access to the second portion of the user profile by the second user is restricted (314), wherein restricted access requires specific authorization by the first user for the provision of information from the second portion of the user profile of the first user, and the profiler stores the content in the second portion (260) if the confidence level is below the predetermined threshold.
- The system of claim 12 including a client (16, 18) to propagate the electronic document to the confidence logic.
- The system of claim 12 wherein the confidence logic determines whether the electronic document is indicated (88) by the first user as being for use in the construction of the user profile.
- The system of claim 12 wherein the confidence logic determines whether the electronic document indicates (88) an attachment as being for use in the construction of the user profile of the first user.
- The system of claim 12 wherein the confidence logic identifies a term (164) within the content.
- The system of claim 18 wherein the term comprises any one of a group consisting of a grammar term, a noun phrase and a word.
- The system of claim 12 wherein the confidence logic analyzes addressee information (195) associated with the electronic document.
- The system of claim 12 including a notifier that notifies (1270) the first user of the content, prior to the content being stored in either the first or the second portion of the user profile of the first user.
- The system of claim 21 wherein the notifier determines whether the confidence level automatically assigned to the content by the confidence logic exceeds a predetermined threshold (258), and notifies the first user of the content when the confidence level exceeds the predetermined threshold.
- A machine-readable medium storing a sequence of instructions that, when executed by a machine, cause the machine to perform the steps of:automatically assigning a confidence level (148) to content within an electronic document associated with a first user, the content being potentially indicative of a characteristic of the first user; andstoring the content (150, 250) in either the first or second portion of a user profile of the first user according to the assigned confidence level (258), wherein the first and the second portions of the user profile of the first user have different access restrictions (260, 262) with respect to a second user's authorization for the provision of information from the user profile of the first user.
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US157092 | 1998-09-18 | ||
US09/157,092 US6115709A (en) | 1998-09-18 | 1998-09-18 | Method and system for constructing a knowledge profile of a user having unrestricted and restricted access portions according to respective levels of confidence of content of the portions |
PCT/US1999/019482 WO2000017781A1 (en) | 1998-09-18 | 1999-08-25 | Method and apparatus for constructing and maintaining a user knowledge profile |
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EP1121650A4 EP1121650A4 (en) | 2006-12-06 |
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Application Number | Title | Priority Date | Filing Date |
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EP99945206.3A Expired - Lifetime EP1121650B1 (en) | 1998-09-18 | 1999-08-25 | Method and apparatus for constructing and maintaining a user knowledge profile |
Country Status (4)
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US (6) | US6115709A (en) |
EP (1) | EP1121650B1 (en) |
AU (1) | AU5786099A (en) |
WO (1) | WO2000017781A1 (en) |
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